From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
To: Sagi Grimberg <sagig-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
Cc: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Liran Liss <liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH 10/11] IB: only keep a single key in struct ib_mr
Date: Tue, 22 Dec 2015 14:59:27 +0100 [thread overview]
Message-ID: <20151222135927.GA26311@lst.de> (raw)
In-Reply-To: <56795514.9090704-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
On Tue, Dec 22, 2015 at 03:50:12PM +0200, Sagi Grimberg wrote:
> This is why I said that the problem here is not the ULPs. But if a new
> HW comes along with distinction between rkeys and lkeys it will have a
> problem. For example a HW allocates two different keys, rkey and lkey.
> And, it chooses to fail SEND from a rkey, or incoming READ/WRITE to a
> lkey. How can such a device be supported with an API that allows a
> single key per MR?
The ULP decides if this MR is going to be used as a lkey or rkey
by passing IB_REG_LKEY or IB_REG_RKEY. The HCA driver will then
fill mr->key by the lkey or rkey based on that and everything will
work fine.
--
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next prev parent reply other threads:[~2015-12-22 13:59 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-22 17:46 memory registration updates Christoph Hellwig
[not found] ` <1448214409-7729-1-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-22 17:46 ` [PATCH 01/11] IB: start documenting device capabilities Christoph Hellwig
2015-11-22 17:46 ` [PATCH 02/11] IB: remove ib_query_mr Christoph Hellwig
2015-11-22 17:46 ` [PATCH 03/11] IB: remove support for phys MRs Christoph Hellwig
[not found] ` <1448214409-7729-4-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-24 12:01 ` Devesh Sharma
2015-11-22 17:46 ` [PATCH 04/11] IB: remove in-kernel support for memory windows Christoph Hellwig
2015-11-22 17:46 ` [PATCH 05/11] cxgb3: simplify iwch_get_dma_wr Christoph Hellwig
2015-11-22 17:46 ` [PATCH 06/11] nes: simplify nes_reg_phys_mr calling conventions Christoph Hellwig
2015-11-22 17:46 ` [PATCH 07/11] amso1100: fold c2_reg_phys_mr into c2_get_dma_mr Christoph Hellwig
2015-11-22 17:46 ` [PATCH 08/11] ehca: stop using struct ib_phys_buf Christoph Hellwig
2015-11-22 17:46 ` [PATCH 09/11] IB: remove the struct ib_phys_buf definition Christoph Hellwig
2015-11-22 17:46 ` [PATCH 10/11] IB: only keep a single key in struct ib_mr Christoph Hellwig
[not found] ` <1448214409-7729-11-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-23 19:41 ` Jason Gunthorpe
[not found] ` <20151123194124.GF32085-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-11-23 19:48 ` Christoph Hellwig
2015-12-22 9:17 ` Sagi Grimberg
[not found] ` <56791542.6020604-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-12-22 13:13 ` Christoph Hellwig
[not found] ` <20151222131326.GA25267-jcswGhMUV9g@public.gmane.org>
2015-12-22 13:50 ` Sagi Grimberg
[not found] ` <56795514.9090704-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-12-22 13:59 ` Christoph Hellwig [this message]
[not found] ` <20151222135927.GA26311-jcswGhMUV9g@public.gmane.org>
2015-12-22 16:58 ` Sagi Grimberg
[not found] ` <56798126.9000003-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-12-22 21:09 ` Jason Gunthorpe
[not found] ` <7sikrilf3ik3fjsgppqxh9gn.1451043246057@email.android.com>
[not found] ` <CAMHdiBDv9mScD+5o90OQ_tmAKw9o48_jfao6W+EBOZkUg+wReA@mail.gmail.com>
[not found] ` <CAMHdiBDv9mScD+5o90OQ_tmAKw9o48_jfao6W+EBOZkUg+wReA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-25 16:46 ` Liran Liss
[not found] ` <CAMHdiBC75n+u9BSMsKxJwcaBnGL68_3UBeQQtHp_CD5KGcUTnQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-01-05 17:46 ` Jason Gunthorpe
[not found] ` <20160105174636.GD16269-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-01-06 6:08 ` Christoph Hellwig
[not found] ` <20160106060806.GA16509-jcswGhMUV9g@public.gmane.org>
2016-01-06 15:10 ` Sagi Grimberg
[not found] ` <568D2E4E.5020806-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2016-01-06 16:59 ` Jason Gunthorpe
2015-11-22 17:46 ` [PATCH 11/11] IB: provide better access flags for fast registrations Christoph Hellwig
[not found] ` <1448214409-7729-12-git-send-email-hch-jcswGhMUV9g@public.gmane.org>
2015-11-23 15:09 ` Chuck Lever
[not found] ` <EE465F12-A5F6-4C95-A77C-199DFF8F77BD-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-11-23 15:49 ` Christoph Hellwig
2015-11-23 18:58 ` Jason Gunthorpe
[not found] ` <20151123185829.GE32085-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-11-23 19:44 ` Christoph Hellwig
2015-11-23 9:03 ` memory registration updates Sagi Grimberg
[not found] ` <5652D66E.5070600-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-11-23 14:16 ` Christoph Hellwig
[not found] ` <20151123141650.GA11116-jcswGhMUV9g@public.gmane.org>
2015-11-23 15:17 ` Sagi Grimberg
[not found] ` <56532E0A.20907-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-11-23 19:43 ` Christoph Hellwig
2015-11-23 15:06 ` Steve Wise
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